Pistout



Dec. 25, 1923.

P. BUTCHER PISTON Filed April 64 i922 2 Sheets-Sheet 2 Thr lui algu nl i-iif'h nt' ihr shell seintinns 9 :tml it? is iwtwwil rtiii'fiitit'ztlljf with this pitnn lin ly. in ntlirmml nt l5., im the rw t-eptnn nt stiituliiy turmoil spring ele-intima 16 fui-nml um! :irrringgetl tu :xr't :ig'iint the; flung@ tl n!l thv nstnei hmly so :as t0 form, the scrtiniw n'tlw .L irl! in n v frmn the faint intl rnntatt with the inrlinwl surtatvs nt tho ril); Q. Il. i :intl uf they i'iistnn hotly.

AS a rvznlt nl this Construction. Whvn a )iftnn mail? :is :1l-nro cltsrriheel i5 u'wuntml in :1n rngincnr pump cylinlvr nl' `slntslhlv, tlinmmiuns. .hf spring elements iti Crim-t with the iipwr inrlnt-rl fartl of vurh rtf liv rihs (if thv pibnn hmlj; lo fruire the mai-tions ni ihr sl'ili fiiitrfarrlly sin is to maizitziin thtlm at all timfr in Qnntfrt with thv` Cylinder walls. t the annie time tliiS pressure of the inclinvd mirtfirss nt the gfrnme? finti shell sections against the similarly inclined SUD faces m" the rits. inzurrs; fluid tight; jnint at a plurality if pnints ietwovn the shell. anfl the piston hotly. Lvakuge of llnigl from (me en'l if thc piston tn the other through the joints hotwwn thtl longitudinal edge?, of the retiens 9 :intl 10 is vtlotvtnally prevented 'because of the tlvsrril'it-,tl nrrangmnrnt nf thel parts Uf snitl joints whcrehy the migra of the prnjvrtinns 1S forming part of them, are in smiling engagement. with thv inrline-.tl snr'faro nf the rihs un tlm pistnn hotly.

ln nrtler to prevent rntiitinn nt the` shell sertinnsnpnntlw pistnn hotly. l nrnrirlt t'hi,y with railinllfr projecting tlnwrl pinfy il" uljerssat the flange 6 anti form grnves or rw Senses l?) Vfor Suid plna in tite :ifljaewnt Mig@ ef Said cxpanling Shell Gertinnf'. To inmtre proper llihriration hrtwn the urtare 0f the shell sections and the cylinder walls. l'. provide in the outer nurture of'suirl svrtinns any nulnher nf grooves 2t) which Mirra to collect und distribute luliriciu'it nntlrr nperutirag cfmrlitions. It will he noted that if fluid under pressure he applied to the pif-.- ton from the bottom instead of from the top, it will act upon the lnwfr vntl or @rige 0f thel shall Sections in a manner `Qinfiil-.ir tu the spring Plements 16, t'nrving Said Sections toward the flange 6 so that the lower in clineti surfaces of their grooves tlv-14 mult@ sealing engagement with the under sides of the ribs :2V-5. at the same time thalt the gections expand or more slightly apart so that their cyliniesil surfaces make luid tight engagvrnrnt with thi) cylinder Walls.

With the have {lvsscribetl arrangement of parts lakuge past the piston in either diY reciinn is etfentnally leakage between the ody und expanding shell, or through the joints between the acljacent edges of the shell sections.

{irevvnrerl as Weil as If desir-Pfl l may (unit thv: ifingv t? :it the unil nl' thv phtml imri turni f hv rminmling slwll in im; mais@ :it cft'iiirtiaig ,-tt"tifs.f\., us* MA illirrtrfitttl in l lg. in thi r l uml. tutti" of art'tiuns il :nifl It?" l'urm nu iiilniilnr i i nl tur mirmifrliiig tir.- gistmi lili-.ir mail tween thv list-rm rik-fein eli.' tnt-w sli-r t zirf 'nrmnicftl @giringrs iti" ttinihiag tti tliOm :linut antw rmirtnn'l rath tht mi Tti typtl as wrl 1n iirillrm' i i rtl'. Mnrtuw-r. mt fla-infami trim t i 55 invention. l 'mii' um: the www wn 'in sriliefl in mimwinn with Vinum .iil :5. "et rithor nt tlw mips g #tv-l in lligf. it? arial 1i. En the {irst @are the piston wir@ i: f" signed for use in it thrrist. or rzwmg in whivii D iilid nniiir prtsanrr ie: iitlmittsvl in amis nf the? vulve which inrlntlmh` :i il 'und tfylintlrirsil lr i 4l. The latrr r;

rquippwl with outwardly prnjnrting Hangin@ 42 at tlwir outer iii'lge'j :intl uw. pwviilwl with angular riiiS *nr mmrtirm with tlv.' parta of a corronpontlingly tcirrnlml fxniiiiiinp' sholi Jl :intl lttb. Them nrt', prrf'rmhiv @interi on h3' Springs awt are rnnstrmffr l t"- A tion in the Sain@ .insinuar @i5 Previti fr n" l@ Qmihrcl in rnnmitinn with the miam trimm of my invention.

l claim:

l. Thrl comhimticm in n pianti nf indy having a pluralitynt'. tnimilfnrtziws thm i1.- oii; with im expanding Lhell nimmtvrl ein Suid body made n'i n? :x plurality nl inrlw pendent svgrntntui svctinns :mtl including 5 inclined Surfnrr? wanting: with the carnival nurfacrs 0f tho tmdy to funn thrill-tight. joints therewith.

The Qomhinwtinn in :a pistmi uit it body having at lrrast ma annular rih lwrreni n@ fnrmerl with n tmiirzil bearing surface: with :L shell mailt ii plilrzilitn,r of segn'iantsii parts formed, tn winner-.itiirith the ril'a: nml means tending tn mm'r i'w .lwl srtmnv lnngitudimill; nii' ihr luity. W5

3. The cnanhinsitiun in n pinten! i. i Y' haring :t iiiiiz'rnlity it :muniti a fmted with twn minimi snifncw; 1i i matitin :i phiraility nl' ,Liri-linnn :imi inning groovrs fornirti to titV :miel rihr. hsf :irliuifvilt edges of said sections being formed with projections coactng to form ia-byrinthinn oints. 3 4. The combination in a piston nf a iwi having u lurality of annular ribs cnc foi-mcd wit two conical surfaces; a she made in a plurniity of sections and; having groovos formed to fit said ribs, the adjacent edges of said sections being formed with projections enacting to form labyrinthne Joints intersecting the inclined suraws of the groovos in limes at rightnnglcn m the center line of t ie piston. i

5. The combination in n, piston ci a "body having a Harige and formed with at lcsisn one annular rib having incned sides; n nisni.

moan m6 on said bod to cooperate with said rib and 'made in a p urniity 0f scctions having nbyzimhinc mints between their adgacom exigen; 'n'i spring marins mounted ieimm in i.: a ni *Lien indy und the adncent pc ne simi?! motions.

Tian cofnhin 'm in a piston of a body having a fixing@ si i 'rs closed and and formed with n puraity c? :mgnrfr cncirciing ribs; n simil mnd@ in n phirni.. 4y of sections hnving gro-WS inward o i sind ribs sind haw nir mrsiionn :i mnt im iange recesn; with spring.; nic-.uns in thc recess i ng; in mmc fhosin neciions longituf .'fj; of n non, 

